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Trade Accounts and Notes Receivable
12 Months Ended
Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]  
Trade Accounts and Notes Receivable
TRADE ACCOUNTS AND NOTES RECEIVABLE
Trade accounts and notes receivable from customers at December 31, 2017 and 2016 consist of the following:
(In thousands)
2017
 
2016
Accounts receivable
$
179,194

 
$
163,759

Notes receivable
5,100

 
4,390

 
184,294

 
168,149

Less allowance for doubtful accounts
860

 
2,474

 
$
183,434

 
$
165,675